1. 1. Licht S. History Of Ultraviolet Therapy in Therapeutic Electricity and Ultraviolet Radiation. 2nd ed. New Haven. Conn: Elizabeth Licht; 1967:191-212.
2. 2. Basford JR. Physical Agents and Biofeedback in Rehabilitation Medicine: Principles and Practice. In: DeLisa JA ed. Philadelphia Pa: JB Lippincott; 1988:257-275.
3. 3. Fork RL. Laser stimulation of nerve cells in aplysia. Science. 1971; 171:907-908.
4. 4. Vizi ES Mester E Tizza S Mester A. Acetylcholine releasing effect of laser irradiation on Auerbach's plexus in guinea pig ileum. J Neural Transm Park Dis Dement Sect. 1977; 40:305.
5. 5. Greattiouse DG Currier DP Gilmore RL. Effects of clinical infrared laser on superficial radial nerve conduction. Phys Ther: 1985; 65: 11 84.